Men suck. Do not just let him off. I would tell him that he better get rid of the little tart if he wants to keep his family. I always reminded my husband that we can be a happy little family & I prefer that, but I'm not going to be treated like dirt, & if he tries that crap He will be paying all his check to child support & alimony & live with his parents
Now I'm on the if you thionk you'll get away w/what ever when the kids get out of the house, think again because alimony, half of everything including your retirement & what ever else I can get for as long as I can get, w/a couple sugar daddys on the side just to piss you off $$ Man I am a "B" But you cant be nice to me, they just suck & respond better to these types of horrible threats. Sorry this happened but make sure he is so scared, upset, uncomfortable....that he wont try it again.